diff --git a/modules/openapi-generator/src/main/resources/python-fastapi/requirements.mustache b/modules/openapi-generator/src/main/resources/python-fastapi/requirements.mustache
index 55a81b2ad109..05d19b30fc51 100644
--- a/modules/openapi-generator/src/main/resources/python-fastapi/requirements.mustache
+++ b/modules/openapi-generator/src/main/resources/python-fastapi/requirements.mustache
@@ -28,7 +28,7 @@ requests==2.33.0
 Rx==1.6.1
 starlette==0.49.1
 typing-extensions==4.13.2
-ujson==5.12.1
+ujson==5.13.0
 urllib3==2.7.0
 uvicorn==0.13.4
 uvloop==0.21.0
diff --git a/samples/server/petstore/python-fastapi/requirements.txt b/samples/server/petstore/python-fastapi/requirements.txt
index 55a81b2ad109..05d19b30fc51 100644
--- a/samples/server/petstore/python-fastapi/requirements.txt
+++ b/samples/server/petstore/python-fastapi/requirements.txt
@@ -28,7 +28,7 @@ requests==2.33.0
 Rx==1.6.1
 starlette==0.49.1
 typing-extensions==4.13.2
-ujson==5.12.1
+ujson==5.13.0
 urllib3==2.7.0
 uvicorn==0.13.4
 uvloop==0.21.0